test case submission needs review (fwd)

I received the attached off list but can't figure out how to use it or
test it.
Can someone teach me how to test this?
I get:
$ atf-run
atf-run: ERROR: Cannot locate the t_gnuseq file
$ atf-run t_gnuseq.sh
atf-run: ERROR: Cannot locate the t_gnuseq file
Or help review it so it can be improved?
Once ready maybe install to src/usr.bin/seq/tests/
Thanks